5 positioning operation – IAI America ACON-CY User Manual

Page 63

5. Operation Using I/O Signals

Positioning

band [mm]

Position

[mm]

Speed

[mm/s]

Acceleration

[G]

Deceleration

[G]

Push

[%]

Rear end

Front end

Intermediate point

Comment

5.2.5 Positioning

Operation

This section explains how to move the actuator from the rear end to the front end, by using an actuator with a
400-mm stroke as an example.
Although the actuator is not stopped at the intermediate point in this example, you can increase the positioning
band and use the intermediate point detection output signal (LS2) just like the zone output signal.

Example of position table

Operation timings

PLC processing 1: The rear end move command signal (ST0) and intermediate point move command

signal (ST2) turn OFF, and the front end move command signal (ST1) turns ON.

Operation:

[1] The actuator starts moving toward the front end.
[2] When the actuator passes the position corresponding to 5.1 mm, the rear end

detection output (LS0) turns OFF.

[3] When the actuator reaches the position corresponding to 150 mm, the

intermediate point detection output (LS2) turns ON. The LS2 turns OFF once the
actuator passes the position corresponding to 250 mm.

PLC processing 2: If necessary, use the intermediate point detection output (LS2) as a trigger signal for

peripheral equipment.
[4] The actuator starts decelerating after reaching the position corresponding approx.

365 mm.

[5] When the actuator passes the position corresponding to 379.9 mm, the front end

detection output (LS1) turns ON.

[6] The actuator stops after reaching the position corresponding to 380 mm.

PLC processing 3: When the front end detection output (LS1) turns ON, the sequence processing is

performed at the front end. Once the sequence processing is completed, the front end
move command signal (ST1) turns OFF.

Caution:

Design a ladder sequence circuit where only one move command signal turns ON at a given time.
If two or more signals are input simultaneously, the signals will be processed according to the set
priorities.
Priorities: [1] Rear end, [2] front end, [3] intermediate point

Front end move

command input (ST1)

Rear end detection

output (LS0)

Intermediate point

detection output (LS2)

Front end detection

output (LS1)

Speed

Rear end

5 mm

Intermediate point

200 mm

Front end

380 mm

Time

Sequence is
performed at
the front end